Time Jul 31 2017

Once upon a time, not so long ago, women got pregnant and spent nine months in suspense before finding out if they were having a boy or a girl. But today? That waiting game is completely outdated, even quaint.

Every aspect of pregnancy is now scrutinized and analyzed — sometimes even beginning before egg meets sperm, as expectant parents gauge if they are carriers for diseases they could pass on to their offspring. Once pregnancy is established, there are tests as soon as the first trimester to assess chromosomes and identify tiny genetic deletions or duplications whose significance may be unclear.